/**
 * Copyright (c) 2010, Casey Lai
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 * 
 * Neither the name of the Cheetah Group nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

package org.cheetahworkflow.designer.part;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.List;

import org.cheetahworkflow.designer.model.Chart;
import org.cheetahworkflow.designer.model.RapidView;
import org.cheetahworkflow.designer.model.StartNode;
import org.cheetahworkflow.designer.policy.ChartLayoutEditPolicy;
import org.eclipse.draw2d.FreeformLayer;
import org.eclipse.draw2d.FreeformLayout;
import org.eclipse.draw2d.IFigure;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.editparts.AbstractGraphicalEditPart;


public class ChartPart extends AbstractGraphicalEditPart implements	PropertyChangeListener {
	
	@Override
	public void activate() {
        super.activate();
        ((Chart) getModel()).addPropertyChangeListener(this);
    }
	
	@Override
    public void deactivate() {
        super.deactivate();
        ((Chart) getModel()).removePropertyChangeListener(this);
    }
    
    @Override
	public void propertyChange(PropertyChangeEvent event) {
        String prop = event.getPropertyName();
        if (Chart.PROP_NODE.equals(prop)) {
            refreshChildren();
        } else if (Chart.PROP_RAPID_VIEW.equals(prop)) {
        	refreshChildren();
        }
    }

	@Override
	protected IFigure createFigure() {
		FreeformLayer figure = new FreeformLayer();
        figure.setLayoutManager(new FreeformLayout());
        return figure;
	}

	@Override
	protected void createEditPolicies() {
		installEditPolicy(EditPolicy.LAYOUT_ROLE, new ChartLayoutEditPolicy());
	}
	
	@Override
	protected List<Object> getModelChildren() {
		Chart chart = (Chart) getModel();
		List<Object> list = new ArrayList<Object>(chart.getNodes());
		
		StartNode startNode = chart.getStartNode();
		if (startNode != null) {
			list.add(startNode);
		}
		
		RapidView rapidView = chart.getRapidView();
		if (rapidView != null) {
			list.add(rapidView);
		}
        return list;
    }
}
